Enable ability to change .NET SDK installation directory by DOTNET_INSTALL_DIR environment variable

README.md

@@ -195,6 +195,7 @@ Some environment variables may be necessary for your particular case or to impro
 
 | **Env.variable**      | **Description** | **Default value** |
 | ----------- | ----------- | ----------- |
+| DOTNET_INSTALL_DIR      |Specifies a directory where .NET SDKs should be installed by the action|*isn't set*|
 | DOTNET_NOLOGO      |Removes logo and telemetry message from first run of dotnet cli|*false*|
 | DOTNET_CLI_TELEMETRY_OPTOUT   |Opt-out of telemetry being sent to Microsoft|*false*|
 | DOTNET_MULTILEVEL_LOOKUP   |Configures whether the global install location is used as a fall-back|*true*|
@@ -204,7 +205,7 @@ Some environment variables may be necessary for your particular case or to impro
 build:
   runs-on: ubuntu-latest
   env:
-    DOTNET_NOLOGO: true
+    DOTNET_INSTALL_DIR: "path/to/directory"
   steps:
     - uses: actions/checkout@main
     - uses: actions/setup-dotnet@v3

dist/index.js

@@ -333,8 +333,10 @@ class DotnetCoreInstaller {
                 if (process.env['no_proxy'] != null) {
                     scriptArguments.push(`-ProxyBypassList ${process.env['no_proxy']}`);
                 }
-                scriptArguments.push('-InstallDir', `'${DotnetCoreInstaller.installationDirectoryWindows}'`);
-                // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
+                if (!process.env['DOTNET_INSTALL_DIR']) {
+                    process.env['DOTNET_INSTALL_DIR'] =
+                        DotnetCoreInstaller.installationDirectoryWindows;
+                }
                 scriptPath =
                     (yield io.which('pwsh', false)) || (yield io.which('powershell', true));
                 scriptArguments = windowsDefaultOptions.concat(scriptArguments);
@@ -349,18 +351,22 @@ class DotnetCoreInstaller {
                 if (this.quality) {
                     this.setQuality(dotnetVersion, scriptArguments);
                 }
-                if (utils_1.IS_LINUX) {
-                    scriptArguments.push('--install-dir', DotnetCoreInstaller.installationDirectoryLinux);
-                }
-                if (utils_1.IS_MAC) {
-                    scriptArguments.push('--install-dir', DotnetCoreInstaller.installationDirectoryMac);
+                if (!process.env['DOTNET_INSTALL_DIR']) {
+                    process.env['DOTNET_INSTALL_DIR'] = utils_1.IS_LINUX
+                        ? DotnetCoreInstaller.installationDirectoryLinux
+                        : DotnetCoreInstaller.installationDirectoryMac;
                 }
             }
-            const { exitCode, stdout } = yield exec.getExecOutput(`"${scriptPath}"`, scriptArguments, { ignoreReturnCode: true });
+            // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
+            const getExecOutputOptions = {
+                ignoreReturnCode: true,
+                env: process.env
+            };
+            const { exitCode, stdout } = yield exec.getExecOutput(`"${scriptPath}"`, scriptArguments, getExecOutputOptions);
             if (exitCode) {
                 throw new Error(`Failed to install dotnet ${exitCode}. ${stdout}`);
             }
-            return this.outputDotnetVersion(dotnetVersion.value, scriptArguments[scriptArguments.length - 1]);
+            return this.outputDotnetVersion(dotnetVersion.value, process.env['DOTNET_INSTALL_DIR']);
         });
     }
     outputDotnetVersion(version, installationPath) {
@@ -523,10 +529,9 @@ run();
 "use strict";
 
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.IS_MAC = exports.IS_LINUX = exports.IS_WINDOWS = void 0;
+exports.IS_LINUX = exports.IS_WINDOWS = void 0;
 exports.IS_WINDOWS = process.platform === 'win32';
 exports.IS_LINUX = process.platform === 'linux';
-exports.IS_MAC = process.platform === 'darwin';
 
 
 /***/ }),

src/installer.ts

@@ -7,7 +7,7 @@ import {chmodSync} from 'fs';
 import {readdir} from 'fs/promises';
 import path from 'path';
 import semver from 'semver';
-import {IS_LINUX, IS_WINDOWS, IS_MAC} from './utils';
+import {IS_LINUX, IS_WINDOWS} from './utils';
 import {QualityOptions} from './setup-dotnet';
 
 export interface DotnetVersion {
@@ -208,11 +208,11 @@ export class DotnetCoreInstaller {
         scriptArguments.push(`-ProxyBypassList ${process.env['no_proxy']}`);
       }
 
-      scriptArguments.push(
-        '-InstallDir',
-        `'${DotnetCoreInstaller.installationDirectoryWindows}'`
-      );
-      // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
+      if (!process.env['DOTNET_INSTALL_DIR']) {
+        process.env['DOTNET_INSTALL_DIR'] =
+          DotnetCoreInstaller.installationDirectoryWindows;
+      }
+
       scriptPath =
         (await io.which('pwsh', false)) || (await io.which('powershell', true));
       scriptArguments = windowsDefaultOptions.concat(scriptArguments);
@@ -229,32 +229,29 @@ export class DotnetCoreInstaller {
         this.setQuality(dotnetVersion, scriptArguments);
       }
 
-      if (IS_LINUX) {
-        scriptArguments.push(
-          '--install-dir',
-          DotnetCoreInstaller.installationDirectoryLinux
-        );
-      }
-
-      if (IS_MAC) {
-        scriptArguments.push(
-          '--install-dir',
-          DotnetCoreInstaller.installationDirectoryMac
-        );
+      if (!process.env['DOTNET_INSTALL_DIR']) {
+        process.env['DOTNET_INSTALL_DIR'] = IS_LINUX
+          ? DotnetCoreInstaller.installationDirectoryLinux
+          : DotnetCoreInstaller.installationDirectoryMac;
       }
     }
+    // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
+    const getExecOutputOptions = {
+      ignoreReturnCode: true,
+      env: process.env as {string: string}
+    };
     const {exitCode, stdout} = await exec.getExecOutput(
       `"${scriptPath}"`,
       scriptArguments,
-      {ignoreReturnCode: true}
+      getExecOutputOptions
     );
     if (exitCode) {
       throw new Error(`Failed to install dotnet ${exitCode}. ${stdout}`);
     }
 
     return this.outputDotnetVersion(
       dotnetVersion.value,
-      scriptArguments[scriptArguments.length - 1]
+      process.env['DOTNET_INSTALL_DIR']
     );
   }
 

src/utils.ts

@@ -1,3 +1,2 @@
 export const IS_WINDOWS = process.platform === 'win32';
 export const IS_LINUX = process.platform === 'linux';
-export const IS_MAC = process.platform === 'darwin';